2(3H)-Furanone, 4,5-dihydro-4-acetyl-5-piperonyl-, (E)- 2(3H)-Furanone, dihydro-4-acetyl-5-(1,3-benzodioxol-5-yl)-, (E)- 88220-99-9 BRN 4487779 trans-4-Acetyl-5-piperonyl-4,5-dihydro-2(3H)-furanone